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August 31, 2014

Posts by Roksana


Total # Posts: 3

Chem
Compared with a pH of 7, a solution of pH 5 has what times/fraction of the hydrogen concentration? 1. 1/100 2. nearly the same concentration 3. twice 4.5/7 5. 100 times
May 4, 2010

Chem
Thank you! Yes it was right
May 4, 2010

Chem
How will you make a 200 mL solution of 1 mM sucrose from a 0.1 M sucrose solution? 1. Mix 20 mL of the 100 mM sucrose and 180 mL of water. 2. Mix 50 mL of the 100 mM sucrose and 150 mL of water. 3. Mix 1 mL of the 100 mM sucrose and 199 mL of water. 4. Mix 10 mL of the 100 mM ...
May 4, 2010

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